testing https://github.com/microsoft/vscode/issues/127362 , debugged with @DavidKutu ## Expected behaviour I expected debugging to work with ipykernel 5.5.5 installed ## Actual behaviour It did not and had some confusing behavior: - `Jupyter: Debug` appeared in the command palette, but only on window reload - I could set breakpoints, but they wouldn't get hit To resolve this, I had to uninstall ipykernel and re-install the latest version with ` pip install ipykernel --pre`